Oh... It appears the battery is missing... meaning it won't work...
But as if that wasn't bad enough, it was later discovered that the program used to run the Game Action Replaywas stored in some sort of RAM, I'm no techie here, which was powered by a battery included in the cartridge. Once this battery run dry the Game Action Replay wouldn't be much more than a useless piece of plastic.
Fortunately Kevin Horton of CopyNES fame came to the rescue and created a program to upload new firmware to the Game Action Replay once the battery has been exchanged with a new one.